of the house and the owner says his brother actually saw flames coming from the bottom floor. >> firefighters also think they know the source of a strange sound neighbors reported hearing. >> it sounded sort of like something being hosed down or like a jet going on and off. >> investigators say at least one propane tank was on the back deck and they are designed to release gas when they heat up. investigators work to stabilize the scene so they can start their investigation today but warn searching for answers may take awhile. in berkeley, ktvu channel 2 news. >>> it is san jose police are investigating two drive by shootings in the same neighborhood that sent two men to the hospital. they happened within two blocks of each other last night on easy street. one happened around 11:30 near cass drive. the 27 year odd victim was walking his bike and shot in the leg from behind. the second shooting happened near el cajon. that victim was shot from behind. police say they have little information about the shooter or shooters. >> we're not sure how many suspects there were. we're assuming since the